diff --git a/modules/angular2/src/web_workers/shared/message_bus.ts b/modules/angular2/src/web_workers/shared/message_bus.ts
index 7791c90623..20eff61f37 100644
--- a/modules/angular2/src/web_workers/shared/message_bus.ts
+++ b/modules/angular2/src/web_workers/shared/message_bus.ts
@@ -62,7 +62,7 @@ export interface MessageBusSource {
   attachToZone(zone: NgZone): void;
 
   /**
-   * Returns an {@link EventEmitter} that emits every time a messsage
+   * Returns an {@link EventEmitter} that emits every time a message
    * is received on the given channel.
    */
   from(channel: string): EventEmitter;